I have an Access front-end database connected to various back-ends (Access, mySQL, dBase) which runs as a separate instance on each users computer. All users have Access 2007, and there are a total of 5 users for this system. Each user runs the database from their local hard-drive.

On one computer I am unable to open any of the linked tables and receive error message 'Unexpected error from external database driver (8458)'. Also, I notice that the Linked Table Manager is disabled (grayed out) when right-clicking on the table link definitions.

Oddly, if I create a blank Access database on this computer, I can create and open linked tables with no problem.

1 Answer
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If you cannot locate the folder, follow these steps. NOTE: Because there are several versions of Microsoft Windows, the following steps may be different on your computer. If they are, see your product documentation to complete these steps.

Funny, I saw this suggestion on the Microsoft kb article and initially thought it did not apply. The article states it was a problem with AC2000, and foolishly I assumed this computer had no Borland software since no other users did. Turns out Borland drivers were present, and the fix applies to AC 2007 as well. Suggestion worked.
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nicholasJun 7 '12 at 14:14